For instructions on how to install your app on the home screen: 

Click your profile icon on the app and select the option "Add to home screen".

This will show you the available options to save the app to your devices home screen.

Unfortunately not all browsers/devices are compatible with this feature. You won’t be able to install the app to home screen on: Chrome - iOS, Edge - iOS or Mozilla - iOS and Safari - Android.

Instead you can simply access the plan with its full features by going directly through your browser address bar.